Samuel Fuller writes, produces and directs this 1960s drama starring Peter Breck as Johnny Barrett, an ambitious reporter who feigns insanity in order to be committed to an asylum where three patients witnessed a brutal murder. Intending simply to uncover the murderer, Johnny soon finds that his own paranoia and the treatment in the institution is pushing him close to real madness. He is caught in a race against time to solve the murder before he loses grip on his own identity.